R* has RE-MADE 3 full GTA Games in a modern, industry leading, engine: Unreal Engine, and is selling all of them in a bundle. R* has not released a GTA for 8 years and not announced one in 10. The 'unthinkable' (actually not, I knew it was going to happen sooner or later) happened:
Clearly because it was 2007, nobody was going to care about an old gen GTA for PSP and PS2 and R* was extremely busy with GTA IV.